1. Cell Imaging and Ultrastructural Research, University of Vienna, A-1030 Vienna, Austria
2. Department of Earth Observation, National Institute for Aerospace Technology, 28850 Madrid, Spain
3. Section of Botany, Faculty of Pharmacy, University Complutense Madrid, 28040 Madrid, Spain
4. Institute of Biology and Ecology, Pavol Jozef Šafárik University, 040 01 Košice, Slovakia
5. Institute of Biotechnology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture, 949 76 Nitra, Slovakia